School Shooting Update A janitor shot and killed the principal of a Placerville Elementary School yesterday during school hours. We'll get an update on the latest news from Placerville Mountain Democrat reporter Jim Ratajczak.

Climate Change Island UC Davis is conducting a large-scalle experiment with ants, lizards and seaweed on a dozen Caribbean islands. Why would studies of the effects of environmental change on complex ecosystems require such a large laboratory? And what have they discovered? We'll talk about it with Jonah Piovia-Scott, Post Doctoral Researcher at the UC Davis Center for Population Biology. 

Snow Shoe Racing An inaugural snow shoe race is being held at Donner Summit this weekend. Race director and ultra runner Peter Fain tells you what it takes to complete a 10k on snow shoes.

Sound Advice: Classical Michael Frost joins us for our weekly music segment, where he'll introduce us to some new and reissued classical pieces.